Why is the Mercator projection the standard map projection?

Why is the Mercator projection the standard map projection?

It became the standard map projection for navigation because it is unique in representing north as up and south as down everywhere while preserving local directions and shapes. The map is thereby conformal. As a side effect, the Mercator projection inflates the size of objects away from the equator.

What was the latitude of the Mercator 1569 map?

Mercator 1569 world map ( Nova et Aucta Orbis Terrae Descriptio ad Usum Navigantium Emendate Accommodata) showing latitudes 66°S to 80°N. The Mercator projection ( / mərˈkeɪtər /) is a cylindrical map projection presented by Flemish geographer and cartographer Gerardus Mercator in 1569.

How does a projection affect a spatial analysis?

5.1 Impact of projections on spatial computation Spatial analyses are typically done using projected, planar coordinates (Chrisman 2016). As all map projections introduce distortion of varying type and quantity across the surface of the projection, selecting a projection to minimize distortion to spatial computation is critical.

When did Erhard Etzlaub make the Mercator projection?

German polymath Erhard Etzlaub engraved miniature “compass maps” (about 10×8 cm) of Europe and parts of Africa that spanned latitudes 0°–67° to allow adjustment of his portable pocket-size sundials. The projection found on these maps, dating to 1511, was stated by Snyder in 1987 to be the same projection as Mercator’s.

Why did Gerardus Mercator create the epic world map?

In 1569, Mercator published his epic world map. This map, with its Mercator projection, was designed to help sailors navigate around the globe. They could use latitude and longitude lines to plot a straight route. Mercator’s projection laid out the globe as a flattened version of a cylinder.

How to calculate the scale factor in Mercator?

When R=1 the result you get is radians. So I calculate y for top and bottom latitudes. Next, I calculate the same radians if the projection is Equirectangular – I simply need to convert top and bottom latitude to radians. And last thing – I just need to find aspect ratio of differences:

What kind of projection does Google Earth use?

// The input image has a SR-ORG:6974 (sinusoidal) projection. // Normalize the image and add it to the map. The order of operations for this code sample is diagrammed in Figure 1. Note that the projection of the input is determined by the output, specifically the maps mercator projection of the map display in the Code Editor.

When did NATO use the Transverse Mercator coordinate system?

In 1947 the North Atlantic Treaty Organisation (NATO) developed the Universal Transverse Mercator coordinate system (generally simply called UTM). NATO recognised that the Mercator/Transverse Mercator projection was highly accurate along its Standard Parallel/Central Meridian.

How does a conformal projection affect the location of an object?

Conformal projections preserve angles around all locations. Because the linear scale of a Mercator map increases with latitude, it distorts the size of geographical objects far from the equator and conveys a distorted perception of the overall geometry of the planet.

When to use the Universal Transverse Mercator projection?

The Universal Transverse Mercator (UTM) projection, developed by the U.S. Army, is widely used in topographic maps. This projection is recommended for areas lying between 84°N to 80°S.

When did Pedro Nunes invent the Mercator projection?

Portuguese mathematician and cosmographer Pedro Nunes first described the mathematical principle of the loxodrome and its use in marine navigation. In 1537, he proposed constructing a nautical atlas composed of several large-scale sheets in the cylindrical equidistant projection as a way to minimize distortion of directions.

Is it possible to show the poles of Mercator?

The Mercator projection is infamous for its distortion at high latitudes. This distortion gets exponentially worse as you approach the poles. It is in fact impossible to show the poles on a Mercator map — they are infinitely far away. Any Mercator map you’ve ever seen must cut off the top/bottom edges at some arbitrary point.

How does the size of a country change on Mercator?

Pressing on the button animates the country ‘shrinking’ to its actual size or ‘growing’ to the size shown on the mercator projection. It was inspired by a similar animation that I saw on reddit and decided I wanted to try to build the same thing.

What are the parameters of the Transverse Mercator?

Transverse Mercator NGA 2014 parameters are as follows: The Universal Transverse Mercator (UTM) coordinate system is a specialized application of the transverse Mercator projection. The world is divided into 60 north and south zones, each six degrees wide. Each zone has its own central meridian and a scale factor of 0.9996.

How did Gerardus Mercator lay out the globe?

Mercator’s projection laid out the globe as a flattened version of a cylinder. All the latitude and longitude lines intersected at 90-degree angles.